B-8-41 BANへのLDCを用いた干渉軽減技術の設計方法(B-8.通信方式,一般セッション)

概要

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Low duty-cycle (LDC) protocol is interference mitigation technique, which can reduce the average interference to the existing radio systems, and LDC protocol is also low power consumption by using lowering pulse repetition interval or pulse occupation time. Thus, in order to design a novel ultra wideband (UWB) system for body area network (BAN) application in the low data low power regime, it is necessary to pay special attentions in the energy requirements and the risk factor for this issue heating (damage) of UWB systems from theoretical and practical viewpoints. In this paper, the co-existence environment between low data rate UWB system such as wireless sensor network including BAN and the existing wideband system using OFDM is considered. In order to analyze the interference mitigation capability of LDC protocol with impulse based UWB (LDC-UWB) system, the frame error rate (PER) of wideband OFDM system is examined for two types of LDC-UWB system. We present that LDC protocol is an efficient interference mitigation technique for low data rate UWB for BAN via computer simulations regardless of definitions of transmitted energy of UWB system. We further investigate the adequate duty-cycle of LDC-UWB system for each definition of transmitted power of UWB communication.
2010-03-02